`ctstelecom.com.br`

DNSSEC	⚠️ Not signed
A	166.0.186.20^{🇺🇸 FABWEB-BR166.0.186.0/24 Used by EndUser}
		PTR	`da5.srvhr.com.br`
NS	`bruce.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b4d^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`bruce.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c14d^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`bruce.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:214d^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`bruce.ns.cloudflare.com`
		A	108.162.193.77^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`bruce.ns.cloudflare.com`
		A	172.64.33.77^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`bruce.ns.cloudflare.com`
		A	173.245.59.77^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`bruce.ns.cloudflare.com`
NS	`megan.ns.cloudflare.com`
		A	2606:4700:50::adf5:3ac5^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`megan.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0c5^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`megan.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20c5^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`megan.ns.cloudflare.com`
		A	108.162.192.197^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`megan.ns.cloudflare.com`
		A	172.64.32.197^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`megan.ns.cloudflare.com`
		A	173.245.58.197^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`megan.ns.cloudflare.com`
MX	`mail.ctstelecom.com.br` ⭐
		A	166.0.186.20^{🇺🇸 FABWEB-BR166.0.186.0/24 Used by EndUser}
			PTR	`da5.srvhr.com.br`
TXT	`v=spf1 a mx ip4:166.0.186.20 include:_spf.srvhr.com.br ~all`
TXT	`v=spf1 include:spf.protection.outlook.com +all`
SOA	`bruce.ns.cloudflare.com`dns@cloudflare.com serial=2403059391

`com.br`

	DNSSEC	⚠️ Not signed
	NS	`a.dns.br` ⭐ ⚠️ Not in parent delegation
	NS	`b.dns.br` ⚠️ Not in parent delegation
	NS	`c.dns.br` ⚠️ Not in parent delegation
	NS	`d.dns.br` ⚠️ Not in parent delegation
	NS	`e.dns.br` ⚠️ Not in parent delegation
	NS	`f.dns.br` ⚠️ Not in parent delegation
	SOA	`a.dns.br`hostmaster@registro.br serial=2026130502

rank #565561 globally
rank #4304 in the tld
WOT: SAFE (69/100)

Previously MX for

ctstelecom.com.br

Subdomains

mail.ctstelecom.com.br

Same first word

ctstelecom.com.br

ctstelecom.com.au

ctstelecom.com

ctstelecom.net

Similar names

stctelecom.net

stctelecom.nl

scttelecom.com

DNS History

12 records (4 active, 8 former)

●NSbruce.ns.cloudflare.com2026-03-27 → 2026-05-10 · 3 obs

○ 2018-01-08 03:40:52
● 2026-03-27 09:52:24
● 2026-05-10 21:17:06

●NSmegan.ns.cloudflare.com2026-03-27 → 2026-05-10 · 3 obs

○ 2018-01-08 03:40:52
● 2026-03-27 09:52:24
● 2026-05-10 21:17:06

○NSns1.extrasite.com.br2015-11-05 → 2018-01-08 · 5 obs

○ 2015-08-11 01:49:32
● 2015-11-05 22:20:08
● 2018-01-08 03:40:52
○ 2026-03-27 09:52:24
○ 2026-05-10 21:17:06

○NSns1.srv3eua.com.br2015-08-11 → 2015-08-11 · 3 obs

● 2015-08-11 01:49:32
○ 2015-11-05 22:20:08
○ 2026-05-10 21:17:06

○NSns2.extrasite.com.br2015-11-05 → 2018-01-08 · 5 obs

○ 2015-08-11 01:49:32
● 2015-11-05 22:20:08
● 2018-01-08 03:40:52
○ 2026-03-27 09:52:24
○ 2026-05-10 21:17:06

○NSns2.srv3eua.com.br2015-08-11 → 2015-08-11 · 3 obs

● 2015-08-11 01:49:32
○ 2015-11-05 22:20:08
○ 2026-05-10 21:17:06

○MXctstelecom.com.br2015-08-11 → 2018-01-08 · 4 obs

● 2015-08-11 01:49:32
● 2018-01-08 03:40:52
○ 2026-03-27 09:52:24
○ 2026-05-10 21:17:06

●MXmail.ctstelecom.com.br2026-03-27 → 2026-05-10 · 3 obs

○ 2018-01-08 03:40:52
● 2026-03-27 09:52:24
● 2026-05-10 21:17:06

○A104.247.195.662015-08-11 → 2015-08-11 · 3 obs

● 2015-08-11 01:49:32
○ 2015-11-05 22:20:08
○ 2026-05-10 21:17:06

●A166.0.186.202026-03-27 → 2026-05-10 · 3 obs

○ 2018-01-08 03:40:52
● 2026-03-27 09:52:24
● 2026-05-10 21:17:06

○A45.35.80.2422015-11-05 → 2016-01-25 · 5 obs

○ 2015-08-11 01:49:32
● 2015-11-05 22:20:08
● 2016-01-25 00:01:00
○ 2016-04-20 01:20:54
○ 2026-05-10 21:17:06

○A67.23.238.182016-04-20 → 2018-01-08 · 5 obs

○ 2016-01-25 00:01:00
● 2016-04-20 01:20:54
● 2018-01-08 03:40:52
○ 2026-03-27 09:52:24
○ 2026-05-10 21:17:06

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
br	a.dns.br, b.dns.br, c.dns.br, d.dns.br...	-
ctstelecom.com.br	bruce.ns.cloudflare.com, megan.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.32.197

NS records: bruce.ns.cloudflare.com, megan.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for ctstelecom.com.br (unsigned zone)

⏱️ Timing

Total: 535ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`166.0.186.20`
NS	2	`bruce.ns.cloudflare.com, megan.ns.cloudflare.com`
MX	1	`mail.ctstelecom.com.br (pri: 0)`
TXT	2	`v=spf1 a mx ip4:166.0.186.20 include:_sp, v=spf1 include:spf.protection.outlook.co`
SOA	1	`bruce.ns.cloudflare.com dns.cloudflare.c`

Analysis

Hierarchy

mail.ctstelecom.com.br is a child of ctstelecom.com.br.

IP Addresses

ctstelecom.com.br resolves to one IP number: 166.0.186.20.

Other host names, for instance ns1.powered.com.br, ipv6.aabbcampinas.org.br, powered.com.br, mail.4wordpress.com.br and cursosmeta.com.br share IP numbers with ctstelecom.com.br.

Name Servers

ctstelecom.com.br's delegation uses two name servers: bruce.ns.cloudflare.com and megan.ns.cloudflare.com.

ctstelecom.com.br uses the same name server setup as other domains, such as elisastream.com, infosconnect.com, evolutivos.net, qukgrow.com and toolsource.co.uk.

ctstelecom.com.br at least partially shares name servers with other domains, including habarkalimantan.com, ligue-jouteslanguedociennes.com, contestingawill.info, fortheloveoffreedom.net and logue.co.

These name servers are often used with alec.ns.cloudflare.com and nancy.ns.cloudflare.com.

Host names with six IP numbers:

bruce.ns.cloudflare.com points to 2606:4700:58::adf5:3b4d, 2803:f800:50::6ca2:c14d, 2a06:98c1:50::ac40:214d, 108.162.193.77, 172.64.33.77 and 173.245.59.77.

megan.ns.cloudflare.com points to 2606:4700:50::adf5:3ac5, 2803:f800:50::6ca2:c0c5, 2a06:98c1:50::ac40:20c5, 108.162.192.197, 172.64.32.197 and 173.245.58.197.

Mail Servers

A single mail server handles ctstelecom.com.br, mail.ctstelecom.com.br.

Host name mail.ctstelecom.com.br resolves to a single IP: 166.0.186.20.

ctstelecom.com.br - robtex.com